Question: Why are ex-rays bad for your body and cause cancer?

You can think of light as if it were Very small particles (called photons). Light has different colours because these particles have different energies. X-rays are just another type of light, just one that your eyes can’t see. (Infrared light might be another one you have heard of). X ray particles carry a lot of energy, that’s why we can use them to see through your body, but that’s also what can make them dangerous if not used carefully.